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1. 介绍：
本文介绍的动态生成 NAS 存储卷的方案：在一个已有文件系统上，自动生成一个目录，这个目录定义为目标存储卷；
镜像地址：registry.cn-hangzhou.aliyuncs.com/acs/alicloud-nas-controller:v1.11.5.4-433631d-aliyun
默认生成资源：生成的 PV 名字为：pvc-${pvc-uid} 生成目录的名字：namespace-pvcname-pvname
可以再 pvc 的 annotations 中如下声明，自定义名字：生成的 pv、目录名字为下面定义的名字。
annotations:
pv-name-created: replace-user-id
2. 部署 NAS Controller
创建 alicloud-nas-controller，实现动态 provider nas pv；创建 alicloud-nas storageclass，为 nas pv provision 提供模板；
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: alicloud-nas
provisioner: alicloud/nas
reclaimPolicy: Delete
parameters:
drivertype: flexvolume
nfsversion: “4.0”
options: “”
—
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: alicloud-nas-controller
namespace: kube-system
spec:
replicas: 1
strategy:
type: Recreate
template:
metadata:
labels:
app: alicloud-nas-controller
spec:
tolerations:
– effect: NoSchedule
operator: Exists
key: node-role.kubernetes.io/master
– effect: NoSchedule
operator: Exists
key: node.cloudprovider.kubernetes.io/uninitialized
serviceAccount: admin
containers:
– name: alicloud-nas-controller
image: registry.cn-hangzhou.aliyuncs.com/acs/alicloud-nas-controller:v1.11.5.4-433631d-aliyun
imagePullPolicy: Always
volumeMounts:
– mountPath: /persistentvolumes
name: nfs-client-root
env:
– name: NFS_SERVER
value: 154154b095-**.cn-beijing.nas.aliyuncs.com
– name: NFS_PATH
value: /
volumes:
– name: nfs-client-root
flexVolume:
driver: alicloud/nas
options:
path: /
server: 154154b095-**.cn-beijing.nas.aliyuncs.com
vers: “4.0”
StorageClass 使用说明：
drivertype: 用来表示生成 pv 存储类型，可选 nfs, flexvolume.
nfs: 默认选项，表示使用 k8s 原生 NFS 驱动挂载；
flexvolume: 表示使用阿里云提供的 Flexvolume NAS 驱动挂载；
nfsversion: 挂载 nfs 使用的版本，支持 3，4.0. 默认为 4.0；
drivertype 为 flexvolume 的时候在这里配置；
为 nfs 的时候通过 mountOptions 配置；
options：为挂载 nfs 的可选项配置；
drivertype 为 flexvolume 的时候在这里配置；
为 nfs 的时候通过 mountOptions 配置；
StorageClass 举例：
## 使用 kubernetes 提供的 NFS 驱动，并配置 mountOptions，reclaimPolicy 为 Delete；
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: alicloud-nas-nfs
mountOptions:
– vers=4.0
– noresvport
provisioner: alicloud/nas
reclaimPolicy: Delete
## 使用阿里云提供的 Flexvolume NAS 驱动，配置 nfs 版本、options；
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: alicloud-nas-flex
provisioner: alicloud/nas
reclaimPolicy: Delete
parameters:
drivertype: flexvolume
nfsversion: “3”
options: “noresvport”
3. 创建应用 -Deployment：
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: replace-user-id
annotations:
pv-name-created: replace-user-id
spec:
storageClassName: alicloud-nas
accessModes:
– ReadWriteMany
resources:
requests:
storage: 5Gi
—
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: “deploy-nas”
spec:
replicas: 1
strategy:
type: Recreate
template:
metadata:
labels:
app: deploy-nas
spec:
containers:
– name: “nginx”
image: “nginx”
volumeMounts:
– name: pvc-nas
mountPath: “/data”
volumes:
– name: pvc-nas
persistentVolumeClaim:
claimName: replace-user-id
执行：
# userID=”hello-123″
# cat deploy.yaml | sed “s/replace-user-id/\”$userID\”/g” | kubectl create -f –
# kubectl get pod | grep deploy-nas
deploy-nas-85696b6bfc-t5dmh 1/1 Running 0 28m
# kubectl get pvc | grep hell
hello-123 Bound hello-123 5Gi RWX alicloud-nas-flex 28m
# kubectl get pv | grep hell
hello-123 5Gi RWX Delete Bound default/hello-123 alicloud-nas-flex 28m
# Nas 目录下查看生成目录：
# ls -l | grep hello
drwxrwxrwx 2 root root 4096 2 月 19 09:58 hello-123
4. 创建应用 -StatefulSet：
使用 volumeTemplateClaim 不支持使用 pv-name-created 配置 pv 名字；
apiVersion: v1
kind: Service
metadata:
name: nginx
labels:
app: nginx
spec:
ports:
– port: 80
name: web
clusterIP: None
selector:
app: nginx
—
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: web
spec:
replicas: 2
serviceName: “nginx”
template:
metadata:
labels:
app: nginx
spec:
containers:
– name: nginx
image: nginx:alpine
volumeMounts:
– mountPath: “/data”
name: pvc-sts
volumeClaimTemplates:
– metadata:
name: pvc-sts
spec:
accessModes:
– ReadWriteOnce
storageClassName: alicloud-nas-flex
resources:
requests:
storage: 2Gi
创建后查看：
# kubectl get pod | grep web
web-0 1/1 Running 0 7s
web-1 1/1 Running 0 4s
# kubectl get pvc | grep web
pvc-sts-web-0 Bound pvc-65ab251a-33ec-11e9-a151-00163e066784 2Gi RWO alicloud-nas-flex 13m
pvc-sts-web-1 Bound pvc-8437c50e-33ed-11e9-a151-00163e066784 2Gi RWO alicloud-nas-flex 5m
# kubectl get pv | grep web
pvc-65ab251a-33ec-11e9-a151-00163e066784 2Gi RWO Delete Bound default/pvc-sts-web-0 alicloud-nas-flex 13m
pvc-8437c50e-33ed-11e9-a151-00163e066784 2Gi RWO Delete Bound default/pvc-sts-web-1 alicloud-nas-flex 5m
# Nas 目录下查看生成目录：
# ls -l | grep sts
drwxrwxrwx 2 root root 4096 2 月 19 10:16 default-pvc-sts-web-0-pvc-65ab251a-33ec-11e9-a151-00163e066784
drwxrwxrwx 2 root root 4096 2 月 19 10:24 default-pvc-sts-web-1-pvc-8437c50e-33ed-11e9-a151-00163e066784
5. 创建应用 -Pod：
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: replace-user-id
annotations:
pv-name-created: replace-user-id
spec:
storageClassName: alicloud-nas-flex
accessModes:
– ReadWriteMany
resources:
requests:
storage: 5Gi
—
apiVersion: v1
kind: Pod
metadata:
name: “nas-pod”
spec:
containers:
– name: “nginx”
image: “nginx”
volumeMounts:
– name: pvc-nas
mountPath: “/data”
volumes:
– name: pvc-nas
persistentVolumeClaim:
claimName: replace-user-id
# userID=”pod-123″
# cat pod.yaml | sed “s/replace-user-id/\”$userID\”/g” | kubectl create -f –
# kubectl get pod | grep pod
nas-pod 1/1 Running 0 32s
# kubectl get pvc | grep pod
pod-123 Bound pod-123 5Gi RWX alicloud-nas-flex 44s
# kubectl get pv | grep pod
pod-123 5Gi RWX Delete Bound default/pod-123 alicloud-nas-flex 48s
# ls -l | grep pod
drwxrwxrwx 2 root root 4096 2 月 19 10:54 pod-123
本文作者：kanjunbao 阅读原文
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